Robtex

Up: 133.26.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 133.27.0.0/17
Down right: 133.27.128.0/17
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
133.27.0.0	PTR	sfc.keio.ac.jp
133.27.3.29	A	ug201-public.sfc.keio.ac.jp
133.27.4.20	A	dnscache.sfc.keio.ac.jp
133.27.4.20	A	dnscache1.sfc.keio.ac.jp
133.27.4.21	A	ns01.sfc.keio.ac.jp
133.27.4.22	A	ns02.sfc.keio.ac.jp
133.27.4.41	A	deutsch.sfc.keio.ac.jp
133.27.5.80	A	inolab.sfc.keio.ac.jp
133.27.5.80	A	infomedia.sfc.keio.ac.jp
133.27.5.80	A	xlab.sfc.keio.ac.jp
133.27.8.44	A	ns5.adst.keio.ac.jp
133.27.8.93	A	gw15-gw13-p2p-2.sfc.keio.ac.jp
133.27.8.118	A	gw2-v61-1.sfc.keio.ac.jp
133.27.10.194	A	coesp-h2.sfc.keio.ac.jp
133.27.10.229	A	coesp-c4.sfc.keio.ac.jp
133.27.16.180	A	ns.sports.sfc.keio.ac.jp
133.27.17.6	A	net17-dhcp005.sfc.keio.ac.jp
133.27.17.7	A	net17-dhcp006.sfc.keio.ac.jp
133.27.17.92	A	net17-dhcp091.sfc.keio.ac.jp
133.27.17.99	A	net17-dhcp098.sfc.keio.ac.jp
133.27.18.85	A	masuilab.com
133.27.18.85	A	masuilab.org
133.27.18.85	A	masui.sfc.keio.ac.jp
133.27.18.127	A	hondana.sfc.keio.ac.jp
133.27.19.73	A	bio.sfc.keio.ac.jp
133.27.19.84	A	c-ns.bioinfo.sfc.keio.ac.jp
133.27.19.84	A	ns1.e-cell.org
133.27.19.89	A	mt-c-polycom.sfc.keio.ac.jp
133.27.26.1	A+PTR	gw2-v315.sfc.keio.ac.jp
133.27.26.100	A+PTR	sfctel2.sfc.keio.ac.jp
133.27.26.110	A+PTR	sfctel3.sfc.keio.ac.jp
133.27.26.112	A	sfctel1.sfc.keio.ac.jp
133.27.28.0	PTR	a-res.net
133.27.36.117	A	green-network.org
133.27.36.161	A	www.xlab.sfc.keio.ac.jp
133.27.36.161	A	brain.xlab.sfc.keio.ac.jp
133.27.44.37	A	net44-dhcp28.sfc.keio.ac.jp
133.27.48.0	PTR	b-res.net
133.27.48.1	A	gw2-v13.sfc.keio.ac.jp
133.27.48.35	A	o410-1.sfc.keio.ac.jp
133.27.48.83	A	w09.sfc.keio.ac.jp
133.27.53.26	A	net52-dhcp-27.sfc.keio.ac.jp
133.27.62.142	A	net56-dhcp-1422.sfc.keio.ac.jp
133.27.71.5	A	wireless-v111.sfc.keio.ac.jp
133.27.71.26	A	net71-dhcp-17.sfc.keio.ac.jp
133.27.76.166	A	net76-dhcp157.sfc.keio.ac.jp
133.27.78.117	A	net78-dhcp108.sfc.keio.ac.jp
133.27.86.104	A	rc3a.org
133.27.87.9	A	smiyake.com
133.27.94.77	A	oz.sfc.keio.ac.jp
133.27.94.149	A	superluminal.sfc.keio.ac.jp
133.27.106.0	PTR	e-res-2.net
133.27.106.6	PTR	dhcp03-v5.sfc.keio.ac.jp
133.27.106.78	A	cwi.sfc.keio.ac.jp
133.27.108.0	PTR	e-res.net
133.27.111.83	A	neuroinfo.jp
133.27.111.180	A	ns2.autoidlab.jp
133.27.111.227	A	net111-cloud178.sfc.keio.ac.jp
133.27.124.3	A+PTR	jsserv.sfc-js.keio.ac.jp
133.27.124.3	A	ns0.sfc-js.keio.ac.jp
133.27.124.13	A	wwwproxy.sfc-js.keio.ac.jp
133.27.124.14	A	wwwproxy.sfc-js.keio.ac.jp
133.27.124.14	A	wwwproxy1501.sfc-js.keio.ac.jp
133.27.126.1	A	gw2-v30.sfc.keio.ac.jp
133.27.126.2	A+PTR	gw2-v30-1.sfc.keio.ac.jp
133.27.126.42	A	g1.sfc.keio.ac.jp
133.27.130.5	A	dhcp-v22.sfc.keio.ac.jp
133.27.130.101	A	polycom1.sfc.keio.ac.jp
133.27.156.71	A	nirvana.sfc.keio.ac.jp
133.27.170.1	A+PTR	htgw.ht.sfc.keio.ac.jp
133.27.170.2	A+PTR	dali.ht.sfc.keio.ac.jp
133.27.170.5	A	wellcomp.org
133.27.170.10	A	vinci.ht.sfc.keio.ac.jp
133.27.171.198	A	dhcp198.ht.sfc.keio.ac.jp
133.27.172.130	A	scutum.awa.sfc.keio.ac.jp
133.27.172.133	A	mail.smiyake.com
133.27.173.94	A	mail.kaminari-lab.net
133.27.173.94	A	ns1.kaminari.sfc.keio.ac.jp
133.27.173.94	A	ns1.kaminari-lab.net
133.27.173.205	A	gc.sfc.keio.ac.jp
133.27.175.5	A	kencho.tom.sfc.keio.ac.jp
133.27.175.26	A	www2005.org
133.27.179.2	A+PTR	ns.awa.sfc.keio.ac.jp
133.27.179.2	A	norma.local.hiro.ne.jp
133.27.179.2	A	norma.awa.sfc.keio.ac.jp
133.27.179.16	A+PTR	ogi.sfc.keio.ac.jp
133.27.180.130	A	neuro.sfc.keio.ac.jp
133.27.180.130	A	gaba1.neuro.sfc.keio.ac.jp
133.27.180.222	A	tomokyo.com
133.27.186.34	A	tsubasa.mkg.sfc.keio.ac.jp
133.27.193.40	A	mail-gw1.mag.keio.ac.jp
133.27.193.41	A	mail-gw2.mag.keio.ac.jp
133.27.193.43	A	dns0.mag.keio.ac.jp
133.27.193.45	A	dns1.mag.keio.ac.jp
133.27.199.99	PTR	ns2.w3.org
133.27.199.99	A	aji.w3.org
133.27.228.201	A	pso.icann.org
133.27.228.209	A	w3c.jp
133.27.239.131	PTR	ns.chi.mag.keio.ac.jp
133.27.240.149	A	chi.mag.keio.ac.jp
133.27.247.161	A	dhcp-247-161.mag.keio.ac.jp
133.27.248.4	A+PTR	erns-vpn.mag.keio.ac.jp
133.27.249.221	A+PTR	vps-host-249-221.mag.keio.ac.jp
133.27.249.221	A	duwote.com
133.27.249.221	A	tanshilundao.com